Are you close enough to let them know it would be helpful if they pitched in on the grocery bill or brought a few things from their pantry when they come...things that might spoil anyway while they are gone...or pasta, rice etc.?
Eggs, potatoes and toast, pancakes or french toast dusted with powdered sugar (only bacon/ham/sausage one Sunday, if you can afford)
Tuna, chicken or egg salad sandwiches for lunch - (or meat sandwiches if you can afford)
Pasta w/meat sauce (I would splurge a little on the cheese) - garlic bread and a big salad with home made dressing (I like ranch or Italian).
Meat loaf, mashed potatoes, salad - garlic bread.
If you buy a BIG ham, you can make many dishes for all meals....that is if your family and company like ham and won't get tired of it.
potato or macaroni salad go a long way and aren't too expensive to make.
If you have a Costco or Sam's Club, you can usually pick up a few whole chickens at a good price. Roasted, fried or BBQ chicken are always a winner.
Chuck roast, potatoes, onions, carrots and GRAVY, salad and rolls..Yummy! I make hash (dices potatoes, celery, onion) or crispy taquitos with guacamole and salsa w/ left over roast.
If you can make good biscuts, there are always a welcome addition to a meal. If your not good at it Bisquick has a good solution, but its more expensive.
Last but not least - A big pot of pinto beans, onions, ham hawks with good chicken or beef stock and water. I use Knor bullion cubes to enhance the flavor, usually 3 at a time and then taste to see if additional cubes are needes. Once the beans are done you can add sea/kosher salt to taste. I also pull the ham hawks, let them cool then shred and put only the good meat back in the beans. I serve them with a big pan of corn bread.
All these meals are cost effective and the left overs can be made into something new in most cases.
Have good visit with your company.... I take my hat off to you for doing 10 days with them....I usually prefer just two or three before someone else in the family takes their turn.
DRINKS: Sun tea and Koolaid --- adult drink, I make a mean Long Island ice tea out of vodka, simple syrup (sugar/water) some sun tea and a splash of Squirt soda....put a sprig of mint on it (if you want) and your guest will think they are really on holiday! PS, you can use the simple syrup for sweetening the kids Koolaid and also make popsicles too. (AHH brings back memories of childhood.
Blessings.